Re-organized list commands to make more sense

/xmail list <list> create
/xmail list <list> join
/xmail list <list> leave
/xmail list <list> op <player>
/xmail list <list> deop <player>
/xmail list <list> disband
Update help menu
Register 2 new shortcuts: /lists and /list
Add kick, ban, and unban to lists
Planned
Cleanup comment
Add server mailing list